If you are using a BlackBerry Enterprise Server, then the data that flies back and forth between your handheld and the server is encrypted. The data stored on your handheld is a different story. Content Protection will encrypt your emails and other content stored in the machine. By choosing this option, you will be protected if someone were to connect the device to a USB port and attempt to read its memory. To enable Content Protection, go to Options > Security Options > General Settings. Set Content Protection to Enabled. You have the choice of applying Content Protection to your Address Book. If you do, you will lose the Caller ID function, so you will have to decide if the risk outweighs the inconvenience.

Password Encryption

There is an already built-in password encryption / storage on your BlackBerry’s desktop called “Password Keeper”. It is a safe way to store passwords on your BlackBerry. You can only access this password store using a password you have set before. This is more secure way to store passwords than using MemoPad or EMails in your mailbox. This is secure enough to store some passwords may be coded to a credit / atm card on the device. I would not write complete login data in there as it is always a good idea to be prepared if someone finally cracks the store.